Combination precast joist and slab



Oct. 13, 1936. c. vALENTl COMBINATION PRECAST JOIST AND SLAB 2 Sheets-Sheet 1 Filed Feb. 13, 1.956

kk Nljlm CCCCCCC Tl COMBINATION PRECAST JOIST AND SLAB m fwgm Fatented @et i3, i936 iig j "iilt PRECAST JST 2 Claims.

This invention relates to a combination joist and slab and it generally aims to provide a novel construction which may be pre-cast from concrete or the like at the factory and delivered in final form to the place of use.

One important object is to provide a structure having joist provided with extensions adapted for interlocking to form a continuous surface and to preferably employ in connection therewith, suitable cross-braces and interlocking means between the same and the joist.

More specific objects and advantages will become apparent from a consideration of the description following taken in connection with accompanying drawings illustrating an operative embodiment.

In the drawings:-

Figure 1 is a view in cross section showing my invention in use in a building;

Figure 2 is a view taken at right angles to Figure 1, showing the invention applied by buildings;

Figures 3 and 4 are fragmentary views of adjacent units;

Figure 5 is a side elevation of one of the crossbraces;

Figure 6 is a prospective View showing a plurality of the units assembled;

Figure 7 is an end view of one of the units, and

Figure 8 is a cross section showing the units used in connection with a brick wall.

Referring specifically to the drawings wherein like reference characters designate like or similar parts, a suitable number of units I0 and Il are preferably used. The end ones are preferably half-units I2 and I3 as shown in Figure 1. Such units and half units are preferably made of concrete and pre-cast, that is, manufactured in the factory and in final form delivered to the building or place of use.

Said units IB and il comprise joists It, and slabs for horizontal extension I5 integral therewith, the units thus being primarily T shaped in cross section.

The extensions I5, at their longitudinal side edges are adapted to interlock and to this end, certain of the slabs are provided with grooves I6, intermediate their upper and lower edges adapted to be entered by tongues I'I on the adjacent slabs, while the remaining side edges have overlapping flanges, ribs or projections I8, and I9, at top and bottom of adjacent slabs. The lefthand half of Figure 1, is the same as the structure of Figure e, with the omission of the lefthand slab portion I5, while the right hand half section I2 in Figure 1 is the same as Figure 3 with the right hand slab portion omitted. Since all of the slabs are not interlocked by the tongues and grooves Il and IE, but half the joints I8 and I9, the units may be more readily laid in place during the construction of a building.

Cross-braces are used between the joists, of the construction shown in Figure 5, the same preferably being made of concrete and pre-cast like units IB and II. Cast integrally with the joist It, are enlargements 2li, which have longitudinal ribs or beads ZI, with which notches 22 in the ends of the cross braces are interfltted. Such cross braces also have longtitudinally extending projections 23 which overlap and are supported on the enlargements 2U. As shown in Figure 1, the longitudinal units or half units at the Walls or partitions may overlap the same as at 2t in Figure 1, or they may have lateral pro- `iections 25, fastened or anchored in the wall. In Figure 1, the wall is shown as having a concrete foundation 26, upon which a wall 21, of any desired construction is built and with which the units are intertted.

At the ends, the units, preferably have longitudinal lugs at 2B, integral therewith, which are adapted to rest on and be interi'ltted in the wall as shown in Figure 2. In that figure, one of the walls, namely that at 29, is a partition wall.

It is clear that the joists units may be connected in the walls in any suitable manner, no matter what construction they are made of Instead of the construction of wall shown in Figures 1 and 2, a brick construction may be used as at 30, in Figure 8.

The units may be used to provide a floor, roof or any structure desired. When a floor is provided, the units preferably have longitudinal grooves 3i, therein having nailing strips 32 to which a Wooden floor or the like may be nailed or fastened. Embedded in the units, are nails or anchors 341, which hold the nailing strips 32, in place. It is also to be understood that the units may be reinforced in any suitable manner as suggested as at 35 and 36 with suitable metallic elements. lLikewise the cross braces may be reinforced by metallic elements as at '311 Various changes may be resorted to provided they fall within the spirit and scope of the invention.

I claim as my invention:-

1. A pre-cast wall structure comprising a pluralty of units, said units consisting of joists. slabs integral with the joists. said slabs interfitting at their longitudinal edges, said slabs having grooves, reinforcing elements extending across the slabs and relatively close to the grooves, nailing strips in said grooves, and means anchored in the material of the joist securing said nailing strips in place.

2. A wall structure comprising a. plurality of units, said units consisting of joists, slabs integral with the joists, said slabs interfitting at their longitudinal edges, said joists having enlargements provided with ribs, in combination with cross-braces having portions overlapping and resting on the enlargements, and lugs integral with. the ends of said Joists to overlap portions of a. wall.

- CARL VALENTI. 

